DVB Series Direct Vent Gas Fireplace
54D0701
27
Flex VeNt INstAllAtIoN
C. Routing UL1777 flex pipe.
1. Always maintain the required clearance when routing the flex vent assembly.
2. Install firestop spacers (
Figure 36
) when penetrating ceiling, attic spaces, or walls.
3. Do not allow the flexible vent to bend in radius tighter than 5" (127 mm).
Figure 35
4. Horizontal runs of flexible vent shall be supported at maximum 2 foot intervals; vertical runs, five feet
intervals. Metal strapping, properly secured, is an acceptable means to support the flexible vent.
5. Flexible vent spacers are to be installed at intervals prescribed by the flexible vent manufacturer; and in such
a way as to maintain concentric inner and outer vent spacing.
D. Attaching flexible venting to vertical termination assemblies.
1. When using Simpson pipe, an MHSC flex-to-pipe adapter and/or rigid pipe section(s) is required to
connect the flexible vent assembly to the vertical termination by using three self-penetrating screws.
2. Review
Figure 37
and corresponding instructions for proper overlap, clamp and screw placement.
3. Three each self-penetrating screws are drilled opposite one another and below the gear clamp.
4. Use only listed and approved terminations and accessories, installed per the installation instructions
and
Figure 36
.
E. Installing flexible venting to horizontal termination assemblies.
1. Connect the 4" flexible vent to the horizontal termination.
Figure 38
2. Slide termination cap adapter ring over the termination cap's outside pipe and secure with three
screws.
3. Connect the 7" flexible vent to the termination adapter ring.
Figure 38
4. Review
Figure 38
for proper overlap and clamp placement.
5. Three each self-penetrating screws are drilled opposite one another and below the gear lamp.
6. Use only listed an approved terminations and accessories, installed per the termination instructions
and
Figure 38
.
Termination
Cap
Storm Collar
Roof Sup-
port
Flashing
Rigid Pipe
Length
Flex to Pipe
Adapter
(FPA/8)
Firestop
UL1777 Flex
PIpe
DVFA/8
Adapter
Figure 36 -
Typical Vertical Flex Vent Installation
FP1974
FP1975
pipe connection
Screws
(3 Places
equidistant
just above
gear clamp)
Rigid Pipe Length
Flex to Pipe Adapter
(FPA/8)
Gear Clamp
1
C\v
" Flexible Pipe and
Adapter Outer Collar Over-
lap
UL1777 Flex Vent
Figure 37 -
Typical Pipe Connection
Gear Clamp
FP1975
FP2099
horizontal flex vent
Screws
(3 Places equidistant
just above gear clamp)
Gear Clamp
UL1777
Flex Vent
1
C\v
" Flexible Pipe and Adapter
Outer Collar Overlap
MHSC Horizontal
Vent Termination
Termination to
Flex Adapter
(FPA/8)
Figure 38 -
Typical Horizontal Flex Vent Installation
FP2099
